Abstract:
:Transfer of the herpes simplex virus type I thymidine kinase (HSV-TK) gene into tumor cells using virus-based vectors in conjunction with ganciclovir (GCV) exposure provides a potential gene therapy strategy for the treatment of cancer. The possibility of using a novel targetable Sindbis virus expression vector containing the HSV-TK gene was examined. Baby hamster kidney (BHK) cells and several human tumor cells infected with a Sindbis virus containing the HSV-TK gene showed strong expression of HSV-TK protein. Cells transduced with the HSV-TK gene exhibited increased TK activity, ranging from 3- to 20-fold over an average baseline level. The human HeLa-CD4+ cells infected with recombinant Sindbis virus containing the HSV-TK gene were sensitive to low concentrations of GCV (0.1-1 microg/ml) and the 50% growth inhibitory concentration (IC50) was 0.6 microg/ml. We also demonstrated applications of cell type-specific Sindbis virus-mediated antigen-antibody targeting of the HSV-TK/GCV system in vitro. Sindbis virus containing the HSV-TK gene packaged in a helper virus displaying the IgG-binding domain of protein A on its envelope could infect various tumor cell lines in the presence of specific antibodies that recognize antigens on their surfaces. HSV-TK-transduced tumor cell lines exhibited sensitivity to GCV. Our data suggest the potential for targeted gene therapy of the HSV-TK/GCV system using a cell type-specific recombinant Sindbis virus vector-antibody system.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Iijima Y,Ohno K,Ikeda H,Sawai K,Levin B,Meruelo Ddoi
10.1002/(sici)1097-0215(19990105)80:1<110::aid-ijcsubject
Has Abstractpub_date
1999-01-05 00:00:00pages
110-8issue
1eissn
0020-7136issn
1097-0215pii
10.1002/(SICI)1097-0215(19990105)80:1<110::AID-IJCjournal_volume
80pub_type
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